摘要详情
839 / 2024-09-19 16:07:59
Release of micro/nanoplastics from disposable protective masks into the aqueous environment
Microplastics; Nanoplastics; Masks; Release
摘要待审
Release of micro/nanoplastics from disposable protective masks into the aqueous environment
Abstract
Yingxia Wu1, Hao Liang2, Juan Wu1, Chao Chai1*
Abstract
Yingxia Wu1, Hao Liang2, Juan Wu1, Chao Chai1*
(1.School of Resources and Environment, Qingdao Engineering Research Center for Rural Environment, Qingdao Agricultural University, Qingdao 266109, China; 2.School of Engineering, China Pharmaceutical University, Nanjing 210009, China)
Disposable protective masks can pollute the environment by releasing microplastics and nanoplastics when they enter the water environment. To gain insight into the pattern of micro/nanoplastics released into the water from masks, the three types of masks, including N95 masks, medical surgical masks, and general medical masks, were selected in this paper. The release amount and characteristics of micro/nanoplastics released from masks as a whole and from each layer of the mask by microcounting and nanoparticle tracking analysis were examined, and the release kinetics were analyzed. The masks were sterilized using four disinfection methods. The effect of the disinfection methods on the release of micro/nanoplastics from masks was investigated. The effect of aging on the release of micro/nanoplastics from masks was investigated using UV irradiation and physical abrasion. Research shows: The micro/nanoplastics released from the different types and brands of masks over a 24 h period ranged from 8.0±0.7×102~26.7±1.0×102 particles/piece and 24.9±2.58×108~83.3±3.3×108 particles/piece mask. There was no significant difference in the release of microplastics between the layers of the masks, but the release of nanoplastics from the middle layer of the masks was as high as 25.9±1.3×108~81.3±5.3×108 particles/piece, higher than that of the inner and outer layers. And the highest release rates were found for microplastics of 1~500 µm and nanoplastics of 100~300 nm, both conforming to the Elovich equation and the power function equation; Autoclaving caused the most damage to the mask structure, followed by steam disinfection and alcohol disinfection, while UV disinfection caused the least effect on the mask structure. Physical abrasion and the UV irradiation caused an increase in the amount of micro/nanoplastics released. The destruction of the mask structure by UV irradiation resulted in the release of more microplastics and nanoplastics, mainly in the size range of 1~500 μm and 0~500 nm.
In summary, The amount of micro/nanoplastic released was independent of the type of protection, price and weight of the masks, but disinfection and wear of masks have an impact on the release amount, and the color of the microplastics released from the masks was predominantly transparent.
Keywords: Microplastics; Nanoplastics; Masks; Release
重要日期
-
会议日期
01月14日
2025
至01月17日
2025
-
09月27日 2024
初稿截稿日期
-
12月14日 2024
注册截止日期
主办单位
State Key Laboratory of Marine Environmental Science, Xiamen University
联系方式
- JKejing GU
- xm******@xmu.edu.cn
- +86*********
